FRTech,
Please note this from Adyen:

A system message went out recently that I want to make sure you are aware of. Essentially Adyen is adding several endpoints in the EU in order to improve network capacity. This requires action from any merchant that is performing IP allowlisting, which I see Wiki does.

In the event that you choose to continue performing allowlisting, we would like to please ask you to add the following IP ranges within your firewall configuration:

For incoming communication sent from merchants’ systems to Adyen’s EU endpoints, please add 147.12.18.0/24.

The date of this change is slated for February 27th, so please let me know if you have any questions before then.